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On 8/7/15 8:00 PM, Davanum Srinivas wrote:
> Mike,
>
> I edited my nova tox.ini like so:
> http://paste.openstack.org/show/412245/
>
> and it seems to be working for me:
> http://paste.openstack.org/show/412246/
OK I can see why the gate passes, the error is exposed only by Alembic 
0.8, because the Column() in the remove operation has no Table 
associated with it.

But the code is still wrong and should be fixed.



>
> -- dims
>
> On Fri, Aug 7, 2015 at 6:42 PM, Mike Bayer <mbayer at redhat.com 
> <mailto:mbayer at redhat.com>> wrote:
>
>     Just a heads up that this recently merged code is wrong:
>
>     https://review.openstack.org/#/c/192760/14/nova/tests/unit/db/test_migrations.py,cm
>
>     and here it is failing tests on my local env, as it does on my CI,
>     as would be expected, there's a lot more if I keep it running:
>
>     http://paste.openstack.org/show/412236/
>
>     However, utterly weirdly, all those tests *pass* with the same
>     versions of everything in the gate:
>
>     http://paste.openstack.org/show/412236/
>
>
>     I have no idea why this is.  This might be on the oslo.db side
>     within the test_migrations logic, not really sure. If someone
>     feels like digging in, that would be great.
>
>     The failure occurs with both Alembic 0.7.7 and Alembic 0.8 as yet
>     unreleased.  I have a feeling that releasing Alembic 0.8 may or
>     may not bump this failure to be more widespread, just because of
>     its apparent heisenbuggy nature, and I'm really hoping to release
>     0.8 next week.  It was supposed to be this week but I got sidetracked.
>
>
>
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> -- 
> Davanum Srinivas :: https://twitter.com/dims
>
>
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